Email Security 101
The basics that hold across attack types: authentication, content filtering, the known-or-pay gate at the door, sender reputation.
The guides are organized as five clusters. Each cluster is a pillar page that collects eight to fifteen long-form field notes on a single topic. Read top to bottom for an end-to-end view, or jump straight to the cluster that fits the problem in front of you.
Email Security 101 is the natural starting point. The Phishing Defense Stack and the Spam Defense Stack go deep on two of the most common attack classes and the controls that hold across them. Setting Up Rythm walks through the 12-minute install on Gmail or Outlook. Migrating From a Competitor covers the practical handoff from Hey, SaneBox, and the native Gmail or Outlook filter stack most teams cobble together.
Each pillar links to the underlying field notes in the blog. The pillars are curatorial; the blog is the long-form record.
The Phishing Defense Stack
A working defense for AI-generated phishing, BEC, fresh-domain impersonation, and the Microsoft 365 vector.
The Spam Defense Stack
For bulk spam, cold outreach, and the well-crafted first email that walks past the content filter.
Setting Up Rythm
The 12-minute install on Gmail or Outlook. OAuth, auto-scan, cover charge, Lightning wallet.
Migrating From a Competitor
Switching to Rythm from Hey, SaneBox, Superhuman, or a Gmail filter stack you cobbled together.
The Library
The complete content index. Every long-form post grouped by category and tag.
One plan. One price.
Keep your existing Gmail or Outlook. Cancel anytime.
$1.65
per month
Annual on Lightning includes one bonus month. See full pricing.